Thread: 25 or 23 HP Kawasaki Engine FH721 or FH680 pics of Rebuild all the way through.

Ball hone puts a nice finish on the cylinders...if used properly...
I still use my 2 4 in spring hones...120 and 400 grit stones..
The spring hones give a true read on the cylinder walls...where as the ball hone scratches everything..
I get the crosshatch close with the 120 grit...and finish the crosshatch with the 400 grit..
This allows the rings to seat without roughing up the new rings...and also provides excellent oil control.

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I built a 383 stroker motor for a street stip car final honing was done with 600 grit hone at machine shop. Honing I've seen here looks a little rough for new rings...

Sounds like you found a machine shop that knows their way around the inside of an engine.
I did not invent the 2 hone crosshatching method...it was taught to me by a master engine builder.
There is a lot of horsepower hiding inside an engine...reducing friction is a good place to start.

__________________
If You Have All The Answers...Except The One You Need...You're Not Trying Hard Enough...
Do The Work

Sounds like you found a machine shop that knows their way around the inside of an engine.
I did not invent the 2 hone crosshatching method...it was taught to me by a master engine builder.
There is a lot of horsepower hiding inside an engine...reducing friction is a good place to start.